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tigry1 [53]
3 years ago
5

Assume that random guesses are made for nine multiple choice questions on an SAT​ test, so that there are equal 9 ​trials, e

ach with probability of success​ (correct) given by p equals 0.4. Find the indicated probability for the number of correct answers. Find the probability that the number x of correct answers is fewer than 4.
Mathematics
1 answer:
lys-0071 [83]3 years ago
4 0

Answer:

df,tru,,,

Step-by-step explanation:

You might be interested in
The line segment between (9,6) and (-2,-1) is bisected at (3.5,2.5). Find the y-intercept of the perpendicular bisector.
tangare [24]

Answer:

Y-intercept is (0,8)

Step-by-step explanation:

Firstly, we need to get the equation of the line segment

We have the general equation as;

y = mx + b

m is the slope and b is the y-intercept

So for the slope between (9,6) and (-2,-1); we have

m = (y2-y1)/(x2-x1)

m = (-1-6)/(-2-9) = -7/-11 = 7/11

Mathematically, when two lines are perpendicular, their slopes have a product of -1

Let the slope of the second line be m

m * 7/11 = -1

7m = -11

m = -11/7

The equation of the second line is;

y = mx + b

y = -11x/7 + b

The line passes through the point (3.5,2.5)

So,

2.5 = -11/7(3.5) + b

2.5 = -5.5 + b

b = 2.5 + 5.5

b = 8

so the y-intercept of the perpendicular bisector is 8

4 0
3 years ago
Students in 10th and 11th grade were asked whether they have a job. The raw data was converted to relative frequencies and recor
Softa [21]

Answer:

a)- Given that a student is a 10th grader, there is a 14% chance he or she has a job.

Step-by-step explanation:

Option (a) is correct here because Relative frequency means the probability of occurrence or number of time-specific event occurs to the total event.

Option (b) is not correct because We already know that student is in 10th or 11th grade, after that we get to know about 14% chance.

Option (c) & (d) are clearly not possible.

5 0
3 years ago
Read 2 more answers
Make a sketch of the cross section resulting from the slice shown in the right square pyramid below. Then, using complete senten
Assoli18 [71]

Answer:3

Step-by-step explanation:

38+s6$

6 0
3 years ago
Which expression is positive?
Snezhnost [94]

Answer:

A

Step-by-step explanation:

the answer is A

.......

8 0
3 years ago
Read 2 more answers
Add −2/3+2 3/8 . Write your answer as a mixed number in simplest form.
d1i1m1o1n [39]

Answer:

41/24 or 1 17/24

Step-by-step explanation:

2 3/8=19/8

-2/3+19/8

-16/24+57/24

41/24

5 0
2 years ago
Read 2 more answers
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